61 lines
1.6 KiB
PHP
61 lines
1.6 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
namespace App\Media\MSVideo\Containers\rlist;
|
||
|
|
|
||
|
|
// https://cdn.hackaday.io/files/274271173436768/avi.pdf
|
||
|
|
|
||
|
|
use Illuminate\Support\Arr;
|
||
|
|
|
||
|
|
use App\Media\MSVideo\Container;
|
||
|
|
|
||
|
|
class strh extends Container
|
||
|
|
{
|
||
|
|
protected const unpack = [
|
||
|
|
'type'=>['a4',4], // FCC type
|
||
|
|
'handler'=>['a4',4], // FourCC of codec to be used
|
||
|
|
'flags'=>['a4',4],
|
||
|
|
'priority'=>['v',2],
|
||
|
|
'language'=>['v',2],
|
||
|
|
'init_frames'=>['V',4], // Number of the First block of the stream that is present in the file.
|
||
|
|
'scale'=>['V',4],
|
||
|
|
'rate'=>['V',4],
|
||
|
|
'start'=>['V',4], // Start time of stream.
|
||
|
|
'length'=>['V',4], // Size of stream in units as defined in dwRate and dwScale
|
||
|
|
'buffer_size'=>['V',4], // Size of Buffer necessary to store blocks of that stream. Can be 0 (in that case the application has to guess)
|
||
|
|
'quality'=>['V',4],
|
||
|
|
'sample_size'=>['V',4], // number of bytes of one stream atom
|
||
|
|
'frame'=>['V',4],
|
||
|
|
];
|
||
|
|
|
||
|
|
public function __construct(int $offset,int $size,string $filename,bool $be,?string $data)
|
||
|
|
{
|
||
|
|
parent::__construct($offset,$size,$filename,$be,$data);
|
||
|
|
|
||
|
|
$this->cache = $this->cache($data);
|
||
|
|
|
||
|
|
$this->type = Arr::get($this->cache,'type');
|
||
|
|
|
||
|
|
// For debugging
|
||
|
|
if (FALSE)
|
||
|
|
$this->debug = hex_dump($data ?: $this->data());
|
||
|
|
}
|
||
|
|
|
||
|
|
public function __get(string $key): mixed
|
||
|
|
{
|
||
|
|
switch ($key) {
|
||
|
|
case 'audio_samplerate':
|
||
|
|
case 'video_framerate':
|
||
|
|
return Arr::get($this->cache,'rate') / Arr::get($this->cache,'scale',1);
|
||
|
|
|
||
|
|
case 'audio_codec':
|
||
|
|
case 'video_codec':
|
||
|
|
return Arr::get($this->cache,'handler');
|
||
|
|
|
||
|
|
case 'duration':
|
||
|
|
return Arr::get($this->cache,'length');
|
||
|
|
|
||
|
|
default:
|
||
|
|
return parent::__get($key);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|